#include <LiquidCrystal.h>
#include <Keypad.h>

const int ROW_NUM    = 4; // jumlah baris pada keypad
const int COLUMN_NUM = 4; // jumlah kolom pada keypad

char keys[ROW_NUM][COLUMN_NUM] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte pin_rows[ROW_NUM] = {7, 6, 5, 4};    // terhubung dengan pin-pins baris keypad
byte pin_column[COLUMN_NUM] = {3, 2, 1, 0}; // terhubung dengan pin-pins kolom keypad

Keypad keypad = Keypad(makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM);

LiquidCrystal lcd(13, 12, 11, 10, 9, 8);  // Sesuaikan pin LCD dengan koneksi di Arduino

const float hargaPerLiter = 10000.0;  // Harga per liter bensin
float totalBensin = 0.0;  // Jumlah total bensin yang dibeli
float totalHarga = 0.0;   // Jumlah total harga yang harus dibayar



void setup() {
  lcd.begin(16, 2);  // Inisialisasi LCD dengan ukuran 16x2
  lcd.print("Selamat Datang Di SPBU");
  delay(2000);
  lcd.clear();
}

void loop() {
  char key = keypad.getKey();  // Membaca input dari keypad
  
   if (key) {
    if (key == 'A'){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp 10000");
      lcd.setCursor(0, 1);
      lcd.print("Bensin: 1.00 ");
      delay(2000);
      lcd.clear();  // Membersihkan layar LCD
      for (float i=0; i<=10000; i+=50){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp ");
      lcd.print(i);
      lcd.setCursor(0, 1);
      lcd.print("bensin ");
      lcd.print(totalBensin+=0.005);
      
      delay(50);
      }
    }
      if (key == 'B'){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp 20000");
      lcd.setCursor(0, 1);
      lcd.print("Bensin: 2.00 ");
      delay(2000);
      lcd.clear();  // Membersihkan layar LCD
      for (float i=0; i<=20000; i+=50){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp ");
      lcd.print(i);
      lcd.setCursor(0, 1);
      lcd.print("bensin ");
      lcd.print(totalBensin+=0.005);
      
      delay(50);
      }
      }
      if (key == 'C'){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp 30000");
      lcd.setCursor(0, 1);
      lcd.print("Bensin: 3.00 ");
      delay(2000);
      lcd.clear();  // Membersihkan layar LCD
      for (float i=0; i<=30000; i+=50){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp ");
      lcd.print(i);
      lcd.setCursor(0, 1);
      lcd.print("bensin ");
      lcd.print(totalBensin+=0.005);
      
      delay(50);
      }
      }
      if (key == 'D'){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp 40000");
      lcd.setCursor(0, 1);
      lcd.print("Bensin: 4.00 ");
      delay(2000);
      lcd.clear();  // Membersihkan layar LCD
      for (float i=0; i<=40000; i+=50){
      lcd.setCursor(0, 0);
      lcd.print("Total: Rp ");
      lcd.print(i);
      lcd.setCursor(0, 1);
      lcd.print("bensin ");
      lcd.print(totalBensin+=0.005);
      
      delay(50);
      }
    }
  }
  
  delay(1000);  // Memberi jeda 0.1 detik (sesuaikan sesuai kebutuhan)
}